This is a very VERY early draft of possible BiS lists for the three specs. It is being based off of current stat values at BiS gear and are simply MY PERSONAL approximation. That is, at least, for the v1 format. As gear becomes finalized and the PTR moves into its launch build, hopefully SimCraft and CharDev will have updated their servers to house these items so I can build a true BiS list. Will update the OP with a new "v" as they become available.
Arcane:
Helm: Time Lord's Hood
Neck: Opal of the Secret Order
Shoulders: Time Lord's Mantle
Back: Nanoprecise Cape
Chest: Time Lord's Robes
Bracers: Bracers of the Banished
Gloves: Gloves of Liquid Smoke
Belt: Cord of the Slain Champion
Legs: Time Lord's Leggings
Boots: Janglespur Jackboots
Ring 1: Infinite Loop
Ring 2: Ring of the Riven
Trinket 1: Shard of Woe
Trinket 2: Will of Unbinding
Weapon: Dragonwrath, Tarecgosa's Rest
OH: N/A
Wand: Finger of Zon'ozz
~~~~~~~~~~
Fire:
Helm: Time Lord's Hood
Neck: Opal of the Secret Order
Shoulders: Time Lord's Mantle
Back: Nanoprecise Cape
Chest: Time Lord's Robes
Bracers: Bracers of the Banished
Gloves: Gloves of Liquid Smoke
Belt: Cord of the Slain Champion
Legs: Time Lord's Leggings
Boots: Janglespur Jackboots
Ring 1: Ring of the Riven
Ring 2: Infinite Loop
Trinket 1: Insignia of the Corrupted Mind
Trinket 2: Will of Unbinding
Weapon: Dragonwrath, Tarecgosa's Rest
OH: N/A
Wand: Finger of Zon'ozz
~~~~~~~~~~
Frost:
Helm: Time Lord's Hood
Neck: Opal of the Secret Order
Shoulders: Time Lord's Mantle
Back: Nanoprecise Cape
Chest: Time Lord's Robes
Bracers: Bracers of the Banished
Gloves: Gloves of Liquid Smoke
Belt: Cord of the Slain Champion
Legs: Time Lord's Leggings
Boots: Janglespur Jackboots
Ring 1: Infinite Loop
Ring 2: Ring of the Riven
Trinket 1: Insignia of the Corrupted Mind
Trinket 2: Will of Unbinding
Weapon: Dragonwrath, Tarecgosa's Rest
OH: N/A
Wand: Finger of Zon'ozz
~~~~~~~~~~
NOTE: ALL SETS WERE DONE ON A TROLL MAGE. PERSONAL RESULTS MAY VARY DEPENDING ON PLAYER RACE.